EP0063062B1 - Dichtung für Kreiselmaschine mit hydraulischer Flüssigkeit - Google Patents
Dichtung für Kreiselmaschine mit hydraulischer Flüssigkeit Download PDFInfo
- Publication number
- EP0063062B1 EP0063062B1 EP82400478A EP82400478A EP0063062B1 EP 0063062 B1 EP0063062 B1 EP 0063062B1 EP 82400478 A EP82400478 A EP 82400478A EP 82400478 A EP82400478 A EP 82400478A EP 0063062 B1 EP0063062 B1 EP 0063062B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- sealing
- sleeve
- annular
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/44—Free-space packings
- F16J15/441—Free-space packings with floating ring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/12—Pumps with scoops or like paring members protruding in the fluid circulating in a bowl
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/002—Sealings comprising at least two sealings in succession
- F16J15/004—Sealings comprising at least two sealings in succession forming of recuperation chamber for the leaking fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/002—Sealings comprising at least two sealings in succession
- F16J15/008—Sealings comprising at least two sealings in succession with provision to put out of action at least one sealing; One sealing sealing only on standstill; Emergency or servicing sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
- F16J15/406—Sealings between relatively-moving surfaces by means of fluid by at least one pump
Definitions
- the present invention relates to a sealing device for a rotary hydraulic fluid machine.
- Patent FRA-2340490 discloses a sealing device for rotary machines, with liquid or gaseous fluid, comprising a shaft emerging from a casing and mounted so as to be able to rotate in it, with sealing means serving sealing the shaft at rest and a liquid seal formed by a ring of liquid in a cavity which is bounded outward in the radial direction by a wall of a rotary body rigidly connected from the shaft and towards the inside in radial direction by a wall of a sleeve-shaped element rigidly connected to the casing and spaced from the shaft, the ring of liquid being pushed outwards against said wall of the rotary body by centrifugal force by virtue of the rotational movement, said spacing between the sleeve-shaped element and the shaft constituting a channel supplied by a fluid, limited at the end turned towards the casing by said sealing means and opening at the other end in a annular sealing chamber e which surrounds the shaft, the sealing device further comprising a fluid supply for supplying said sealing chamber, from
- Said sealing means consist of a circular seal carried by the sleeve-shaped element and provided with a lip which, at rest, is applied to the shaft.
- the pressure in the annular chamber is sufficient to detach the annular seal from the shaft.
- the seal is provided by the liquid contained in said chamber, and at rest, it is provided by the annular seal.
- annular seal has a satisfactory behavior in the case of a machine or pump containing a relatively neutral hydraulic fluid, cold or at a moderate temperature and pressure. But it is a gas or even an active liquid, for example a corrosive, harmful liquid, or brought to a high temperature and high pressure, the seal provided at rest by such a seal is clearly insufficient. This is the case, for example, in applications for nuclear energy, or in the treatment of dangerous chemicals, for which the sealing in operation as at rest must be absolutely perfect.
- a first object of the invention is therefore to provide a solution to the problem of the sealing of rotary machines containing such liquids.
- the sealing fluid used in the sealing device consists of the same liquid which is contained in the machine or the pump.
- the liquid is withdrawn from the discharge side of the pump and is introduced into the annular chamber via a pipe comprising a valve for adjusting the withdrawn flow rate. It is understood that, in the case where they are liquids charged with suspended particles, these quickly end up fouling the annular sealing chamber and the cavity of the rotary body and by obstructing the -Pitot tube.
- a second object of the present invention is to remedy this drawback of rotary machines containing charged liquids.
- the sleeve carries a diaphragm with a diameter slightly greater than that of the shaft so as to restrict the passage between the annular chamber and the suction.
- the sealing liquid is directly introduced into the cavity of the rotary body through a channel drilled in the sleeve, and by means of a nozzle, the orifice of which is closed by a spring blade, the free end of which is in the path of the liquid ring contained in the rotary body and is oriented in the direction of movement of said ring, so that it undergoes the antagonistic actions of the pressure of the liquid ring and that of the liquid injected by the nozzle.
- the nozzle opening is adjusted so that the thickness of the liquid ring is constant.
- a third object of the present invention is to simplify the structure of this sealing device while making it more efficient.
- a fourth object of the invention is to provide means intended to absorb hydraulic shocks, such as water hammer, which is exerted hundred on pumps, especially at start-up.
- the present invention therefore aims to remedy the aforementioned drawbacks of the sealing device of the aforementioned patent and for this purpose proposes a sealing device with very high efficiency, and which at the same time can be very simply adapted on rotary machines with hydraulic fluid.
- the invention therefore relates to a sealing device of the type defined above, and which is characterized in that between the free internal peripheral edge of the rotary body and the adjoining wall of the sleeve around which it fits, is mounted a gasket.
- said seal comprising an annular body which fits with a small clearance around the sleeve, a lip seal turned towards the side of the body cavity rotating and capable of being applied in a sealed manner on the outer surface of the sleeve, and an annular radial projection housed inside an annular groove formed in said peripheral edge of the rotary body and whose dimensions are greater than those of said projection, so as to avoid any friction of the projection on the rotating body, in rotation.
- the seal is prevented from rotating, but is allowed to move axially along the sleeve, by means of a lug integral with the sleeve or the housing and projecting into an axial slot provided on the annular body of the seal.
- the free peripheral edge of the rotary body is shaped on either side of the frustoconical wall groove of the same axis as the shaft and which moves away from the shaft as it enters the body cavity. turning.
- the liquid is applied against said frustoconical wall and, under the action of centrifugal force, it slides along this wall towards the inside of the rotating body and is reintegrated into the liquid ring.
- the internal walls of the cup-shaped part and of the flat annular part constituting the rotary body are provided with radial and axial fins allowing better drive of the liquid ring.
- the provision of these fins has made it possible to considerably improve the performance of the Pitot tube and consequently the efficiency of the liquid sleeve according to the invention.
- the sleeve is made in two parts, namely: a first part mounted coaxially around the shaft, in the orifice of the casing through which the shaft exits and a second part secured to the first, for example by screwing, and which projects inside the cavity of the rotating body and carries the Pitot tube.
- the sleeve has an internal diameter significantly greater than that of the shaft, the annular chamber defined between the sleeve and the shaft receiving a floating ring intended to absorb the hydraulic shocks exerted on the machine, said ring having an internal diameter greater than that of the shaft and being provided at its ends with diaphragms making a slight clearance with the shaft so as to allow its free rotation while limiting the leakage of the sealing liquid towards the machine and towards the rotary body, said floating ring being immobile in rotation and in axial translation relative to the sleeve, but being radially movable.
- the floating ring bears by its ends against two radial faces formed on the sleeve, with the interposition of a seal, a lug secured to one of said radial faces projecting inside a slot formed at the adjacent end of the floating ring and of oversized radial height so that the ring is free to move radially.
- a channel pierced in the sleeve or the casing is connected to a source of external sealing liquid and on the other hand, the outlet orifice of the Pitot tube.
- the annular passage between the floating ring and the shaft communicates, respectively through the two diaphragms, with the machine and with the cavity of the rotary body.
- the sealing liquid can either be taken from the discharge side of the pump, or supplied by an independent source of liquid, via a pressure regulator whose adjustment takes account of the characteristics of the sealing device.
- the annular sleeve is formed in two parts, namely: a first part 18a mounted coaxially around the shaft 14 of the pump, and fixed with the interposition of a seal 46 , inside the orifice 12 through which the shaft exits the casing 16, and a second part 18b projecting inside the cavity 52 of the rotary body 20 and which is secured to the part 18a, by screwing of two tubular portions 110, 112, belonging to said parts and which externally form a continuous cylindrical surface 114.
- the rotary body 20 comprises a cup-shaped part 54 and a substantially flat annular part 56 with a hub 55.
- the latter is fitted around the shaft 14 and fixed by means of a screw 64, or other means of the same efficiency. , an O-ring 62 ensuring sealing.
- the cup-shaped part 54 is secured to the part 56 by its outer edge by means of a circlip 58 and with the interposition of a seal 60.
- the internal peripheral edge 116 of the cup-shaped part 54 comes opposite the continuous surface 114 and a radial annular flange 118 projecting from the part 18b towards the inside of the cavity 52.
- the positions of parts 54 and 56 can be reversed.
- the cup-shaped part would be fixed to the shaft 14 and the flat part would be placed facing the surface 114 of the sleeve 18a, 18b.
- the cup part 54 comprises axial and radial fins 57 and the flat part 56 comprises radial fins 59.
- a non-rotating seal 120 This comprises an annular body 122 which fits with a slight clearance around the surface 114 and a radial annular projection 124 which is housed inside an annular groove 126 formed on the peripheral edge 116 of the cup-shaped part 54. Between the walls of the projection 124 and those of the groove 126 there remains a small clearance so as to avoid any friction during the rotation of the rotary body.
- the annular body 122 of the seal carries a lip seal 123 which seals with the sleeve 18a, 18b. The seal 120 can therefore move axially, on the sleeve.
- the peripheral edge 116 of the part 54 is shaped as a frustoconical surface with the same axis as the shaft 14 and inclining towards the shaft as that it moves away from the cavity 52 of the rotary body 20.
- the lips of the seal 120 are turned towards the side of the cavity 52 and overlap with an annular lug 134 projecting from the part 18b to form a winding journey with great pressure drop.
- the part 18b carries the Pitot tube 48.
- the capture orifice 50 thereof is located in the cavity 52 of the rotary body 20, in the vicinity of the external periphery of said cavity and its outlet orifice opens into the annular chamber 30 formed between parts 18a, 18b and shaft 14.
- a floating ring 136 of internal diameter greater than the diameter of the shaft 14 and of external diameter less than the internal diameter of the parts 18a, 18b.
- the ring is provided at its ends with diaphragms 138, 140 making a slight clearance with the shaft 14.
- the shaft 14 can therefore rotate freely, at the same time as the leaks of sealing liquid towards the rotating body 20 and towards the pump are limited.
- the floating ring therefore has a degree of radial freedom, which allows it to absorb the hydraulic shocks manifested in the sealing device.
- the annular chamber 30 communicates with the tubular passage 22 defined between the shaft 14 and the floating ring 136 through several holes 148 drilled in the latter.
- the tubular passage 22 communicates through the diaphragms 138 and 140 with the suction side of the pump and with the cavity 52.
- the chamber 30 opens the channel 36, through which the sealing liquid is supplied.
- This liquid can be constituted by the liquid itself of the pump, taken from the delivery side. However, in the case where this liquid is charged, it is preferable to use an independent uncharged liquid, supplied by a source of liquid, via a pressure regulator.
- the pressure regulator is adjusted so that the passage 22 is maintained at a pressure higher than the pressure P prevailing on the suction side of the pump.
- the pressure at the collecting orifice 50 of the Pitot tube is greater than said pressure P.
- the sealing liquid arriving in the annular chamber 30 gains the annular passage 22 through the holes 148 and gives rise to low flow rates leakage through the diaphragms 138, 140 to the pump and to the rotary body 20.
- the leakage rate to the rotary body is projected at the periphery of the cavity and magnifies the liquid ring 70.
- any increase in the thickness of the liquid ring 70 creates an imbalance and the volume of liquid corresponding to this increase is transferred by the Pitot tube 48 to the chamber 30, from where it flows towards the machine, through the holes 148 and the diaphragm 138 .
- the liquid contained in the tubular passage 22 constitutes a real seal, preventing any leakage of the pump to the outside.
- the sealing liquid which is heated due to its rotation is cooled in contact with the fresh liquid contained in the chamber 30.
- the pressure at the collecting orifice 50 is lower than the pressure P.
- the floating ring 136 must not have any holes 148. If it did, the pressure P would be communicated through the diaphragm 138 and the holes 148, to the chamber 30 and therefore to the outlet orifice of the Pitot tube, which would block. On the contrary, if the holes 148 are closed, the chamber 30 is not overpressure and the Pitot tube can therefore function normally. The excess liquid arriving at the chamber 30 is discharged to an external capacity, not shown.
- the sealing device which has just been described can be mounted as well on any rotary machine with hydraulic fluid newly constructed as on already existing rotary machines, using a conventional sealing means, such as a cable gland, or pluggers controlled by screws.
- a conventional sealing means such as a cable gland, or pluggers controlled by screws.
- the part 18a of the sleeve will for example be inserted in the braid box.
- the sealing device illustrated in FIG. 2 is more particularly intended for cases where it is desired to provide a seal at the high security stop of the rotary body 20. We will only describe in detail below the new elements of the device sealing.
- the tubular sleeve is here also produced in two parts 18a and 18b, ending in tubular portions 110, 112 by which they are secured, by screwing.
- the tubular portion 112 has an outer diameter smaller than that of the tubular portion 110.
- annular piston valve 154 In the interval between the internal peripheral edge of the cup-shaped part 54 and the external stepped surfaces 114 and 115 of the tubular portions 110 and 112 is slidably mounted axially an annular piston valve 154 in place of the gasket. sealing 120 of the embodiment of FIG. 1.
- the piston valve 154 has two internal cylindrical walls of diameters respectively equal to the external diameters of the tubular portions 110, 112, an O-ring 156 ensuring the sealing between the walls in contact.
- the outer wall of the piston valve 154 has a cut profile which fits with play in a complementary profile formed on the internal peripheral edge of the cup-shaped part 56 so as to define a narrow zigzag passage 158 with great loss of charge, designed to limit leaks.
- the piston valve has on its outer wall, an annular surface 160 located in a radial plane, and the peripheral edge of the part 54 comprises an annular seat 162 also located in a radial plane opposite the surface 160 and which may be optionally metallized.
- the piston valve defines with the tubular portions 110 and 112 a chamber 166 into which opens a channel 168 connected to a second Pitot tube 170 of the same shape and the same characteristics that the Pitot tube 48, not shown in FIG. 2.
- the second Pitot tube 170 feeds and pressurizes the chamber 166, which causes the axial displacement of the piston valve 154 by a few tenths of a millimeter, against the force of the springs 164, thus detaching the valve piston of its seat 162 and thereby eliminating any friction between the fixed parts and the rotating parts.
- the chamber 166 When stopped, the chamber 166 is no longer subjected to the pressure, so that the springs 164 return the piston valve 154 to its initial position, bringing the face 160 into contact with its seat 162.
- the pump is of this made completely isolated from the outside.
- the sealing device operates in the same way as that of the embodiment of FIG. 1.
- FIG. 3 differs from that of FIG. 2 in that the annular piston valve 154 is hollowed out at its internal periphery and receives in the recess thus formed an annular bellows 172 or an equivalent device, fixed by its ends on a radial face 174 of the part 18a of the tubular sleeve and on a radial face 176 of the piston valve 154.
- the channel 168 which is connected to the second Pitot tube 170 opens out inside the bellows 172.
- On the wall outside of the bellows is atmospheric pressure.
- the second Pitot tube 170 puts pressure on the interior chamber or bellows 172, which causes the extension of the latter and therefore the displacement of the piston valve 154 to the right in FIG. 3 and consequently the detachment of the seal 178 of its seat 162 on the cup-shaped part 54. Any friction is thereby eliminated.
- Figures 4a and 4b show two possible combinations of the sealing device of Figure 1 with a mechanical seal.
- the mechanical seal comprises on the one hand, a first ring 180 fixed around the shaft 14 on the rotary machine side, by means of a screw, an O-ring 182 ensuring the seal, a bellows 184 surrounding the shaft 14 and fixed by its ends to the first ring 180 and to a second ring 186 making a slight clearance with the shaft and which carries a lateral annular seal 188 without contact with the shaft, and on the other hand , a third ring 190 making a slight clearance with the shaft and secured to the fixed sleeve part 18a by means of a lug 192 which allows slight axial displacements of the ring 190 relative to the part 18a.
- An O-ring 194 seals between the ring 190 and the part 18a during the axial displacements of said ring.
- the assembly of the ring 180, the bellows 184, the ring 186 and the side seal 188 is integral with the shaft and therefore rotates with it, while the ring 190 is fixed.
- the lateral seal 188 is kept in rubbing contact with the ring 190 by the bellows 184 without ever coming off.
- the interior space 196 to the mechanical seal is in communication with the tubular passage 22 of the sealing device, but completely isolated from the exterior space 198 which communicates with the hydraulic machine.
- the sealing liquid feeds said interior space 196 through the holes 148 and the diaphragm 138 of the floating ring 136, and is brought back to the source of liquid by a tube 200 connected to a channel 202 drilled in the casing 16 and in the Exhibit 18a. It goes without saying that the sealing liquid can be introduced through the tube 200 and evacuated through the pipe 36.
- the seal seals the shaft section 14, between the ring 180 and the floating ring 136 of the sealing device.
- the seal has the same elements as above, but fixed so that the interior space 196 of the seal is this time in communication with the machine and that the space exterior 198 is in communication with the sealing device.
- the ring 190 is fixed by means of the lug in the opening 204 of the casing, the seal 194 ensuring the seal at said opening, while the ring 180 is fixed with seal on the shaft of the sealing device side.
- the sealing liquid is introduced into the space 198, through the diaphragm 138 and is brought back to the supply source by a tube 206.
- FIG. 5 shows another alternative embodiment of the sealing device.
- a nozzle 84 (see also FIG. 6), which opens into the cavity of the rotary body, can feed the liquid ring 70 directly.
- the valve which is on the supply fluid pipe of the sealing chamber with a pressure regulator or pressure reducer connected to the channel 82.
- the orifice of the nozzle 84 is stressed simultaneously by antagonistic counterpressure actions of the liquid ring and also plays a role of second Pitot tube, since the increase in the thickness of the liquid ring causes the pressure in the liquid ring supply channel, which acts on the pressure regulator or the pressure reducer, which intervenes to automatically adjust the compensating flow while keeping the thickness of the liquid ring constant.
- the sealing device comprises a sleeve 18 with an internal diameter greater than that of the shaft and secured to the casing by any known means.
- the cavity of the rotary body 20 is supplied by the discharge fluid from the machine, via a pipe, not shown, connected to a fitting 34, and the passage 82 pierced in the sleeve and the nozzle 84 which opens out. in said cavity.
- the orifice of the nozzle 84 is controlled by a leaf spring fixed on the sleeve.
- the sleeve ends at its end which carries the Pitot tube by a diaphragm 32 which restricts the cross section of the passage from the sealing chamber to the cavity of the rotary body. At its other end, the sleeve carries a floating ring 100 with an internal diameter slightly greater than the diameter of the shaft 14.
- the substantially flat annular part of the rotary body 20 is fitted on its internal periphery with a lip seal 92 which, when the pump is stopped, is clamped on the sleeve 18, which prevents air from entering the rotating body and therefore defusing the machine.
- the floating ring 100 is held against the axial movements by a flange 102 screwed onto the sleeve 18 by screws 104.
- a lug 106 prevents the floating ring from turning.
- the sealing device ' is fixed to the compressor or the turbine by engaging the sleeve 18 in the sealed box 210. For this purpose, two-thirds of the conventional sealing with labyrinths or carbon rings will be eliminated.
- the rotary body 20 will be fixed on the shaft 14 of the compressor or of the turbine. On the shaft 14 is set the rotor 209 of the turbine.
- the sealed box 210 is closed by a bottom 212 embedded in an opening 214 in the casing 216.
- Said bottom has an orifice 218 crossed with clearance by the shaft 14 of the turbine.
- Baffles 220, 222 formed on the shaft and on the wall of the orifice 218 define a zigzag or labyrinth path intended to limit steam leaks from the interior space 219 of the casing 216 towards a chamber 224 for receiving fluids defined between the end of the sleeve 18, the shaft 14 and the sealed box 210 and to oppose the introduction of liquid inside the casing.
- the shaft portion included inside the reception chamber 224 carries a deflector 226 intended to eject the flow rate of liquid leakage through the floating ring 100 towards the periphery of the reception chamber 224.
- a deflector 226 intended to eject the flow rate of liquid leakage through the floating ring 100 towards the periphery of the reception chamber 224.
- At the most bottom of the latter is pierced an orifice 228 in which fits a pipe 230 connected to a trap 232, for example of the float type, with progressive and continuous flow.
- the sealing device is supplied with water, which can be supplied by an independent circuit or be taken from the bearing refrigeration circuit, not shown. It is still possible to take some of this water from the trap 232.
- the sealing device In the case of compressors, the sealing device must be supplied with oil.
- the pressurized steam coming from inside the casing 216 supplies a leakage flow through the labyrinth 220, 222, towards the reception chamber 224.
- the water leakage through the floating ring 100 is ejected by the deflector 226 on the periphery of the chamber 224.
- the water is then collected by the tube 230 and recovered by the trap 232.
- the pressure inside the receiving chamber 224 is identical to that prevailing inside the casing 216, the water contained in the chamber 224 cannot enter the interior space 219, which allows a constant rate of leakage of steam through the labyrinth, since the steam condenses on contact with water in chamber 224.
- the trap the water is evacuated as it is formed. There is therefore in operation, no risk of water penetration inside the housing. It is therefore saturated steam which is contained in the receiving chamber 224, in the pipe 230 and in a part of the trap 232.
- the water supplied by the trap can be recovered in suitable circuits.
- the sealing device is kept pressurized at shutdown thanks to the gasket 92.
- the steam turbines are always heating up, which therefore poses no problems of sealing, provided that the sealing device is also permanently supplied. This condition is fulfilled since the water used to cool the turbine is supplied by a network.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Claims (23)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8107065 | 1981-04-08 | ||
| FR8107065A FR2503823A2 (fr) | 1981-04-08 | 1981-04-08 | Dispositif d'etancheite pour machine rotative a fluide hydraulique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0063062A1 EP0063062A1 (de) | 1982-10-20 |
| EP0063062B1 true EP0063062B1 (de) | 1986-05-28 |
Family
ID=9257174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP82400478A Expired EP0063062B1 (de) | 1981-04-08 | 1982-03-16 | Dichtung für Kreiselmaschine mit hydraulischer Flüssigkeit |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4410187A (de) |
| EP (1) | EP0063062B1 (de) |
| DE (1) | DE3271319D1 (de) |
| FR (1) | FR2503823A2 (de) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3545281A1 (de) * | 1985-12-20 | 1987-07-02 | Mtu Muenchen Gmbh | Gleitringdichtung |
| US5193974A (en) * | 1991-07-01 | 1993-03-16 | Bw/Ip International, Inc. | Dynamic pressure recovery seal |
| US5975840A (en) * | 1997-10-29 | 1999-11-02 | Envirotech Pumpsystems, Inc. | Pitot tube pump having axial-stabilizing construction |
| DE102010064419B3 (de) | 2009-03-03 | 2012-11-22 | Sew-Eurodrive Gmbh & Co. Kg | Anordnung zur berührungslosen Abdichtung einer drehbar gelagerten Welle zu einem Gehäuse hin und Getriebe |
| WO2011107191A1 (de) * | 2010-03-03 | 2011-09-09 | Sew-Eurodrive Gmbh & Co. Kg | Anordnung zur berührungslosen abdichtung einer drehbar gelagerten welle zu einem gehäuse hin und getriebe |
| BR112013015945B1 (pt) | 2010-12-21 | 2020-12-15 | Starite Industries, Llc | Bomba e câmara de vedação úmida |
| US9347458B2 (en) | 2010-12-21 | 2016-05-24 | Pentair Flow Technologies, Llc | Pressure compensating wet seal chamber |
| FR2967228B1 (fr) * | 2011-12-21 | 2013-03-29 | Poclain Hydraulics Ind | Drain pour montage d'etancheite dynamique |
| DE102015220932B4 (de) * | 2015-10-27 | 2017-09-07 | Eagleburgmann Germany Gmbh & Co. Kg | Hochdruck-Gleitringdichtungsanordnung |
| US10393272B2 (en) * | 2015-11-24 | 2019-08-27 | Kaydon Ring & Seal, Inc. | Sleeve configured for use in a non-contacting gas seal and gas seal including the sleeve |
| CN112377453B (zh) * | 2020-12-07 | 2024-08-20 | 江苏华青流体科技有限公司 | 一种高温热水泵机械密封装置 |
| CN113184967B (zh) * | 2021-05-11 | 2022-09-13 | 寿光市人民医院 | 一种沉淀物快速沉降的污水处理设备 |
| CN218991432U (zh) * | 2022-03-07 | 2023-05-09 | 胡通 | 一种门下口密封装置 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR632014A (fr) * | 1927-04-04 | 1927-12-30 | Méthode et moyens pour réaliser des joints étanches sur les arbres | |
| US2352336A (en) * | 1942-06-24 | 1944-06-27 | Gen Motors Corp | Lift-off seal for adapters and regulators |
| US2494971A (en) * | 1944-04-27 | 1950-01-17 | Jet Shaft Seals Inc | Sealing device for shafts |
| US2665929A (en) * | 1948-09-10 | 1954-01-12 | John W Sawyer | Shaft sealing device |
| US2823052A (en) * | 1954-04-12 | 1958-02-11 | Gen Motors Corp | Fluid seal device |
| US2917329A (en) * | 1955-05-13 | 1959-12-15 | City Nat Bank And Trust Compan | Rotary seal |
| US3563558A (en) * | 1968-11-04 | 1971-02-16 | Scovill Manufacturing Co | Piston seal with distortable ribs |
| GB1350752A (en) * | 1970-04-03 | 1974-04-24 | Sykes Ltd Henry | Rotary shaft seal |
| GB1334478A (en) * | 1972-05-10 | 1973-10-17 | Filton Ltd | Centrifugal pumps |
| CS176838B1 (de) * | 1975-07-25 | 1977-06-30 | ||
| FR2340490A1 (fr) * | 1976-02-04 | 1977-09-02 | Legoy Auguste | Dispositif d'etancheite pour machine rotative a fluide hydraulique |
| US4199152A (en) * | 1979-03-19 | 1980-04-22 | Rockwell International Corporation | Hydrostatic seal for centrifugal pumps |
| US4305592A (en) * | 1979-10-23 | 1981-12-15 | Transamerica Delaval, Inc. | Gas seal bushing |
-
1981
- 1981-04-08 FR FR8107065A patent/FR2503823A2/fr active Granted
-
1982
- 1982-03-16 EP EP82400478A patent/EP0063062B1/de not_active Expired
- 1982-03-16 DE DE8282400478T patent/DE3271319D1/de not_active Expired
- 1982-04-06 US US06/366,072 patent/US4410187A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0063062A1 (de) | 1982-10-20 |
| DE3271319D1 (en) | 1986-07-03 |
| FR2503823A2 (fr) | 1982-10-15 |
| FR2503823B2 (de) | 1983-07-29 |
| US4410187A (en) | 1983-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0063062B1 (de) | Dichtung für Kreiselmaschine mit hydraulischer Flüssigkeit | |
| CA2719472C (fr) | Dispositif et procede d'equilibrage de pression dans une enceinte palier de turboreacteur | |
| EP2440806B1 (de) | Stossdämpfer und mit solch einem stossdämpfer versehenes fahrwerk | |
| EP2402613B1 (de) | Trockenvakuumpumpe | |
| EP3610176B1 (de) | Anordnung mit einem planetenradsatz | |
| FR2927366A1 (fr) | Dispositif de recuperation d'huile. | |
| FR2675213A1 (fr) | Systeme formant barriere pour l'huile de lubrification des paliers d'un compresseur centrifuge muni de joints d'etancheite a labyrinthe installe dans un environnement confine. | |
| FR2920207A1 (fr) | Pompe a vide de type seche comportant un dispositif d'etancheite aux fluides lubrifiants et elements centrifugeur equipant un tel dispositif | |
| WO2016016545A1 (fr) | Élément de turbomachine comprenant un moyen d'étanchéité auxiliaire et procédé de test de cet element | |
| EP0097549B1 (de) | Anordnung um die Abdichtung eines Tauchmotors zu realisieren und sich darauf beziehender Motor | |
| EP3580431B1 (de) | Ring zur verminderung des überdrucks in der nähe der stromaufwärtigen dichtung eines lagergehäuses eines turbinen-strahltriebwerks | |
| EP2430314A1 (de) | Zentrifugalpumpe mit doppeltem auslass | |
| FR2549177A1 (fr) | Systeme pneumatique d'embrayage | |
| FR3072136A1 (fr) | Systeme d'etancheisation d'une tige de piston pour une machine a mouvement alternatif et procede pour l'etancheisation d'une telle tige de piston | |
| FR2991022A1 (fr) | Systeme d'etancheite a compensation de pression pour arbre de rotation ou de translation. | |
| FR3090035A1 (fr) | Dispositif de deshuilage et d’etancheite d’une enceinte de lubrification de turbomachine | |
| EP3661793B1 (de) | Druckregelvorrichtung und verfahren für ihren zusammenbau, für einen kraftstoffdampffilter | |
| EP0159236B1 (de) | Hydraulischer Druckgeber und seine Dichtmanschette | |
| EP0097548B1 (de) | Bohrlochpumpe und Verfahren zu ihrem Schutz | |
| FR3036441B1 (fr) | Gicleur d'huile capote | |
| FR3065269A1 (fr) | Train d'engrenages epicycloidal | |
| CA2980677A1 (fr) | Gicleur d'huile pour turbomachine | |
| FR2668553A1 (fr) | Machine tournante a butee axiale auto-eclipsable a membrane flexible soumise a la pression d'un fluide. | |
| FR2765653A1 (fr) | Dispositif de confinement a gaz supportant temporairement une surpression elevee | |
| EP3081816A1 (de) | Verdichter oder pumpe mit zwei kugeln zum abstützen der welle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): BE DE GB IT NL |
|
| 17P | Request for examination filed |
Effective date: 19830402 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE DE GB IT NL |
|
| REF | Corresponds to: |
Ref document number: 3271319 Country of ref document: DE Date of ref document: 19860703 |
|
| ITF | It: translation for a ep patent filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| ITPR | It: changes in ownership of a european patent |
Owner name: CESSIONE;SOCIETE ANONYME LEGOY |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: 732 |
|
| NLS | Nl: assignments of ep-patents |
Owner name: SOCIETE ANONYME LEGOY TE MONTVILLIERS, FRANKRIJK. |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 19890317 Year of fee payment: 8 |
|
| ITTA | It: last paid annual fee | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Effective date: 19900331 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19900331 Year of fee payment: 9 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19900813 Year of fee payment: 9 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19900815 Year of fee payment: 9 |
|
| BERE | Be: lapsed |
Owner name: S.A. LEGOY Effective date: 19900331 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19910316 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19911001 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee | ||
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19920101 |